include/wx/msw/region.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        region.h
   3 // Purpose:     wxRegion class
   4 // Author:      Markus Holzem, Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef __REGIONH__
  13 #define __REGIONH__
  14
  15 #ifdef __GNUG__
  16 #pragma interface "region.h"
  17 #endif
  18
  19 #include "wx/list.h"
  20 #include "wx/gdiobj.h"
  21
  22 class WXDLLEXPORT wxRect;
  23 class WXDLLEXPORT wxPoint;
  24
  25 enum wxRegionContain {
  26         wxOutRegion = 0, wxPartRegion = 1, wxInRegion = 2
  27 };
  28
  29 // So far, for internal use only
  30 enum wxRegionOp {
  31 wxRGN_AND,          // Creates the intersection of the two combined regions.
  32 wxRGN_COPY,         // Creates a copy of the region identified by hrgnSrc1.
  33 wxRGN_DIFF,         // Combines the parts of hrgnSrc1 that are not part of hrgnSrc2.
  34 wxRGN_OR,           // Creates the union of two combined regions.
  35 wxRGN_XOR           // Creates the union of two combined regions except for any overlapping areas.
  36 };
  37
  38 class WXDLLEXPORT wxRegion : public wxGDIObject {
  39 DECLARE_DYNAMIC_CLASS(wxRegion);
  40         friend class WXDLLEXPORT wxRegionIterator;
  41 public:
  42     wxRegion(long x, long y, long w, long h);
  43     wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
  44     wxRegion(const wxRect& rect);
  45
  46         wxRegion(void);
  47         ~wxRegion(void);
  48
  49         //# Copying
  50         inline wxRegion(const wxRegion& r)
  51                 { Ref(r); }
  52         inline wxRegion& operator = (const wxRegion& r)
  53                 { Ref(r); return (*this); }
  54
  55         //# Modify region
  56         // Clear current region
  57         void Clear(void);
  58
  59         // Union rectangle or region with this.
  60         inline bool Union(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_OR); }
  61         inline bool Union(const wxRect& rect) { return Combine(rect, wxRGN_OR); }
  62         inline bool Union(const wxRegion& region) { return Combine(region, wxRGN_OR); }
  63
  64         // Intersect rectangle or region with this.
  65         inline bool Intersect(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_AND); }
  66         inline bool Intersect(const wxRect& rect)  { return Combine(rect, wxRGN_AND); }
  67         inline bool Intersect(const wxRegion& region)  { return Combine(region, wxRGN_AND); }
  68
  69         // Subtract rectangle or region from this:
  70     // Combines the parts of 'this' that are not part of the second region.
  71         inline bool Subtract(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_DIFF); }
  72         inline bool Subtract(const wxRect& rect)  { return Combine(rect, wxRGN_DIFF); }
  73         inline bool Subtract(const wxRegion& region)  { return Combine(region, wxRGN_DIFF); }
  74
  75         // XOR: the union of two combined regions except for any overlapping areas.
  76         inline bool Xor(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_XOR); }
  77         inline bool Xor(const wxRect& rect)  { return Combine(rect, wxRGN_XOR); }
  78         inline bool Xor(const wxRegion& region)  { return Combine(region, wxRGN_XOR); }
  79
  80         //# Information on region
  81         // Outer bounds of region
  82         void GetBox(long& x, long& y, long&w, long &h) const;
  83         wxRect GetBox(void) const ;
  84
  85         // Is region empty?
  86         bool Empty(void) const;
  87     inline bool IsEmpty(void) const { return Empty(); }
  88
  89         //# Tests
  90         // Does the region contain the point (x,y)?
  91         wxRegionContain Contains(long x, long y) const;
  92         // Does the region contain the point pt?
  93         wxRegionContain Contains(const wxPoint& pt) const;
  94         // Does the region contain the rectangle (x, y, w, h)?
  95         wxRegionContain Contains(long x, long y, long w, long h) const;
  96         // Does the region contain the rectangle rect?
  97         wxRegionContain Contains(const wxRect& rect) const;
  98
  99 // Internal
 100         bool Combine(long x, long y, long width, long height, wxRegionOp op);
 101         bool Combine(const wxRegion& region, wxRegionOp op);
 102         bool Combine(const wxRect& rect, wxRegionOp op);
 103 };
 104
 105 class WXDLLEXPORT wxRegionIterator : public wxObject {
 106 DECLARE_DYNAMIC_CLASS(wxRegionIterator);
 107 public:
 108         wxRegionIterator(void);
 109         wxRegionIterator(const wxRegion& region);
 110         ~wxRegionIterator(void);
 111
 112         void Reset(void) { m_current = 0; }
 113         void Reset(const wxRegion& region);
 114
 115         operator bool (void) const { return m_current < m_numRects; }
 116         bool HaveRects(void) const { return m_current < m_numRects; }
 117
 118         void operator ++ (void);
 119         void operator ++ (int);
 120
 121         long GetX(void) const;
 122         long GetY(void) const;
 123         long GetW(void) const;
 124         long GetWidth(void) const { return GetW(); }
 125         long GetH(void) const;
 126         long GetHeight(void) const { return GetH(); }
 127
 128 private:
 129         long     m_current;
 130         long     m_numRects;
 131         wxRegion m_region;
 132     wxRect*  m_rects;
 133 };
 134
 135 #endif
 136         // __REGIONH__